Anchorage device



July 2, 1929- H.k RosENBERG 1,719,136

ANCHORAGE DEVICE Filed ooi-, 24, 192s V Patented July 2, 1929.

UNITED STATES PATENT OFFICE.

HEYHAN BOSENBERG, l NEW YORK, N. Y.

ANCHORAGE DEVICE.

application 'mea october a4, 192s. seal n. 610,444.

This invention relates to improvements in su ports or anchors, and has as its primary AobJect the provision for effective anchorage under conditions of minimum opportunity for purchase. n

A more detailed object 1s the provision of a construction affording an increased length of bearing for resisting lateral stresses where the normal bearing oil/.the anchoring dev'ice is normally relatively short.

Affurther object in view is the effective anchorage of a structure'adapted to receive its main stresses laterally of itself and outwardly of the engaged support.

Wi h these and further objects in view as f will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, Icombinations and arrangement of parts as subsequently specified and claimed.

In the accompanying drawings, Figure 1 is a sectional elevation of a structure einbodying the features of the present 2 invention.

tends from the eye 3 throughout the entire length of the body 1 and terminates at the tip of its pointed or entering. end. The thread 2 is hardened so as to cut4 or enter ordinary soft iron or soit steel substantially without injury to the thread. The harden-4 ing of the thread 2 may be accomplished in any well known way, but for purposes of facility and economy, it is preferable to produce the hardening of the thread by the usual cyanide case-hardening process.4 As

will 'become obvious from the method of employinthe screw, the hardening of the surface o the body 1 andeye 3 by the casehardening process is but-^an incident of that process, the essential requisite being that the thread 2 shall be hardened to` the exf' tent previously indicated. Surrounding the body 1 at its outer portion in position for contacting with the anchorage extension or '5to that produced in the manner'described in diameter to the diameter of the i eye-3 isa llar 4, whichi collar is referably formed o sheet metal and stampe orotherwise broui ht to a concave-convex shape. The centra portion of the collar 4 is formed with a to snug y receive and surround a lpart o engaged portion of the eye 3 an rmit the eye to freel revolve while engaging the A collar. The e ge of collar -4 1s formed 1parti-globular depression 5 adapttcel" with serrations or teeth 6, 6, and the said teeth are hardened to thesame degree the hardness of thethread 2.

The improved su port of ancho device made up -of t e screw andI co ar is adapted to be applied to relatively thin sheet metal structures, such as hollow metal window frames and trim, sheet metal ducts, ceilings and walls, and like sheet metal structures. When the anchorage extension assumesthe form of an eye,l as shown, it is ada ted to receive the cord of a window sha e or- 'for attaching la picture frame or" thelike. VIt is to be observed that the ang chorage extension may assume any other contour than that of an eye, according to the particular use to which 1t is to be put P with the functigns of the anchorage device 1n mind. The anchorage device may be alp-. plied either as seen in Figure 1 or as seen' 1n igure 4. In the former, vthe relatively thin.

sheet of metal is indicated at 7 and has been punched with a sharpiointed, ta ring ro y punch havin'g a cylindri shank whic uced the boss 8 formed of the metal o tlfe sheet 7 This formation is somewhat similar m my Patent No. 1,299,232, dated April 1', 1919, and coverin certain improvements in the art of fastenlng sheets together. VThe opening through the boss 8 is substantiallyoqual andthe improved ancho e device is a plied by having the enterm point of the screw 1 introduced into sai bore and the screw revolved.. The collar 4 is, of course, placed on the screw before the screw is caused to enga e the boss 8. As the screw is revolved, aA r the introduction of .the netrating point thereof into the'borc of ss .8, the t read 2 will 'cut the metal of said boss or enter the same and form a cooperating internal thread therein 'so that continued rotation of the'scnew brings the parts to the position vseen `in lliv re 1..l It will be observed that the threa 2 in this position has a very efectivo [anchorage in it isa fact that the sheet lexes or buckles under the bltin action of the sheet 7, so that direct longitudinal withdrawal of the body of the screw is practi cally impossible. During the bringing of the parts to this position, as the bod of thescrew approaches its final position, t e teeth or serrations 6 are caused to en agea'nd enter the metal of sheet 7 as clear y seen in Figure 1, until an effectively locked relation is obtained between the three parts, the screwand its anchorage extension, the collar 4, and the sheet ,7. While usually too minute for illustration without reat magnification,

g frequently slightly the teeth -6 on the'one hand an the opposite pulling action of the thread 2 onA the i other, and such buckling materially increases the oeked-together relation of the parts. 0

en the parts are thus brou ht to the position seen in Figure 1,- the anc orage deviceis ready for functioning to support anything which may be caused to engageits anchorage extension, and by repeated -tests itv has been proved that the anchorage is so ef fective that in practically every inst-ance a large area of the sheet 7 will be torn away, whensuicient stress is placed on the anchorage extension .3, Vwithout any indication of any givevbetwe'en the anchoring device and the sheet 7.

The anchorage device, as shown in Figure 4, is identical with that described and the.

same reference numerals will a ply, except that the body of the screw is sliggl which the'anchorage deviceis to be applied. The sheet 7*, as seen in Figurant, hasbeen drllled or perforated by the use of a shear- 1ng punch which has formed an aperture. lof a slze tosnuglyaccommodate the body of the screw. The application and functioningfof the anchorage device, as seen in Figl ',inthe sheet 7" formed by thread 2 crosses ure 4, is otherwise identical with that described, 1t being apparent, of course, that the only dllerence is that the internal thread the relatively thin cross section of the sheet V 7'* andactually extends a distane less' than l one-half of the circumference of the body of the screw.y The thread 2, however, opposlte the internal thread cut in sheet 7 funderla s the 'sheet andv co-operates'to. make an e ectlve connection between the -screw and sheet. The extent of enga ement with sheet 7 1s, therefore, considera ly'less than the I engagement in the structure seen in Figure tly shorterbecause of the condition o'f the sheet to 1,'.but nevertheless the anchora e incident to ing or the screw for resisting lateral stresses, such as that resultin from the suspension of a weight, is large y'increased.

What is claimed is 1. In anchorage devices, the combination of a collar having an edge adapted to engage the surface of a support, and a screw extending througli and at both sides of the collar, the .portion of the screw extending at one side of the g collar being screwthreaded and adapted to engage the support, and the portion of the screw extending at the other side of the collar being adapted to receive and sustain lateral stresses, and having means engaging the collar for stressing the collar toward the support when the screw-threaded portion is screwed into the support, the edge of the collar being hardened suciently for entering metal, such as Ordinar soft iron orl soft steel, substantial wit out injury to such4 edge. V

r2. In anchorage devices, the combination of a collar havinga serrated biting edge 'adapted to engage the surface of a sup rt,

and a screw extending through and at th sides'of the collar, the portion of the screw extending at one side of the collar being screw-threaded and adapted to engage the support forI anchorage thereto, and the portion of the screw extending at the other side of the collar being adapted to receive and sustain lateral stresses and having means engagin the collar for stressing the collar toward t e support when the screw-threaded portion is screwed into the support, the serrated edge of the collarbelng hardened- Jsuliiciently'for entering metal, such as soft iron or soft steel, substantially without injury to the serrations. i

3. -An article of manufacture for anchorage devices comprisin a concaved collar having its periphery ormed into abiti edge land having said edge sutliciently harl ened for entering metal, such as soft iron or soft steel, substantially without injuryto the edge.

"In testimony -whereof I aflix my signature.

. HEYMAN RSENBERG.

be'aptparent, the -actual length of the bear- 

